framing members along with all details necessary for anchorage of the steel
stud wall system to the building structural systems shall be as shown on
the drawings. Horizontal bridging shall be provided as necessary. Studs
shall be spaced [400 mm 16 inches on center.] [600 mm 24 inches on center]
[as indicated on the drawings.] [as required to resist the specified design
wind or seismic loadings, but not exceeding 600 mm 24 inches on center.]
Coordinate stud spacing with sheathing and anchor requirements. At wall
openings for doors, windows and other similar features, the framing system
shall provide for the installation and anchorage of the required subframes
or finish frames. Steel frames shall be securely attached through built-in
screws. Double studs shall be provided at both jambs of all door openings.
Door frames and other built-in items shall be [spot grouted at the jamb
anchor locations.] [grouted solid.]
3.3
STEEL SHELF ANGLES
Unless otherwise shown, steel shelf angles shall be provided in segments
that do not exceed 3.0 m 10 feet in length. At building corners, shelf
angle segments shall be mitered and securely attached together by welding
with legs no less than 1.2 m 4 feet where possible. Shelf angle segments
shall not be connected together but instead shall be installed with 6 mm
1/4 inch wide gaps between the segments. Fabrication and erection
tolerances shall be in accordance with the AISC Code of Standard Practice,
as indicated in AISC 316.
3.4
INSULATION
The actual installed thickness of insulation shall provide a maximum
thermal R of [_____] for the completed exterior wall construction as
determined in accordance with ASHRAE Fundamentals Handbook. Insulation
thickness shall be as shown on the approved drawings. Installation, except
as otherwise specified or shown, shall be in accordance with the
manufacturer's instructions which shall be approved by the Contracting
Officer. Insulation shall be installed between wall framing members.
Rigid insulation shall be installed in accordance with the manufacturer's
instructions with proper connections through the insulation to prevent the
insulation from carrying loads directly. Insulation with facings shall be
secured to the sides of the framing members to provide a continuous seal so
that the entire weight of the insulation is carried by the framing members.
Where electrical outlets, ducts, pipes, vents or other utility items
occur, insulation shall be placed on the dry side of the item away from
excessive humidity.
3.5
GYPSUM WALLBOARD
Gypsum wallboard shall be installed on the interior face of the cold-formed
steel framing system. Installation shall be as specified in Section 09250
GYPSUM BOARD except at vertical slip joints, the gypsum wallboard shall be
connected to the vertical studs to prevent movement at the slip joint.
3.6
EXTERIOR SHEATHING
Sheathing shall be installed on the exterior face of the cold-formed steel
framing system with self-drilling screws. Screws shall be located a
minimum of 10 mm 3/8 inch from the ends and edges of sheathing panels and
shall be spaced not more than 200 mm 8 inches on each supporting member
except at vertical slip joints, the sheathing shall be connected to the
vertical studs to prevent movement of the slip joint. Edges and ends of
SECTION 04810
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